superhard

adjective
su·​per·​hard | \ ˌsü-pər-ˈhärd How to pronounce superhard (audio) \

Definition of superhard

: extremely hard One way to achieve such a high pressure … is to squeeze a sample between two superhard surfaces.— William J. Nellis

First Known Use of superhard

1891, in the meaning defined above

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The first known use of superhard was in 1891

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Cite this Entry

“Superhard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/superhard. Accessed 11 Aug. 2020.

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